Blasting-power.



WILHELM EBERLE, or ETTLINGEN, NEAR KARLSRUHE, GERMANY.

BLAs'rme-PownER.

Specification of'Letters Patent.

Application filed. August 12, 1908; Serial No. 448,233.

To all whom it may concern:

Be it known that I,WILHELM EBERLE, a subject of the German Emperor, residing at Ettlingen, near Karlsruhe, Baden, Germany, have invented certain new and useful Improvements in Blasting-Powder, of which the following is a specification.

The subject-matter of the present invention is an agent for blasting rocks and the 10 like, and an important object is to provide an agent whichhasthe advantage that when comparatively. small charges are used, it breaks rock into pieces having straight surfaces, without the, rocks or the like being appreciably splintered or shivered.v As compared with the agent which has almost solely come into use heretofore in practice, namely blasting powder, the blasting agent according to the present invention has the further advantage that the intended object can be attained by one single blasting operation, whereas. when blasting powder is used in a bore-hole of the same size, frequently three to four blasting operations were required. Further, the new agent is superior. to blasting powder with regard to danger, since it can be rammed into the bore- "hole by means of an iron rod, for example,

which operation would cause an explosion 1f blasting powder were used.

The blasting agent according to the presentinvention contains saltpeter, sulfur,

. charcoal-and horse-dung in'the form of dust -ent invention has various advantages as or powder, in the proportion of about 12 :3 :1 :1

' parts by weight respectively. As is known,

blasting agents made of like or similar substances have been employed for similar pur poses, as may be seen from the British fatent Specifications No. 13822 of the year 1897 and No. 18516 of the year 1899, as well as from the American Patent Specification No. 757,693, but the agent according to the pres compared with these known agents, as is explained above and hereafter. Namely, ex-

agentspatent specifications were either quite ineffective and were hurled out from the borehole after ignition, and, were thus inoperative, or they only produced a very small effect. I

The astonishing effect obtained with the blasting agent according'to the present invention is apparently attributable to its special composition which is such that an especially favorable combustion and development of gases takes place for the required purpose.

For making the blasting agent, fresh horse-' dung which is thoroughly dried in the air and disintegrated so as to form a fine meal or Patented Jan. 19, 1909.

'peri'ments have shown that the blasting described in the above ment oned powder is employed and is mixed evenly with the othermaterials in the above mentioned proportions;

saltpeter, sulfur, carbon and horse-dung Now I am aware thathave severally been used heretofore for making various blasting agents, and I therefore do not claim an agent consisting of.th1s combination of substances broadly. By mixing these materials in certain definite proportions, however, it is found that very considerably improved results are obtained, and

What 1 claim is r The herein described blasting agent con sistingof saltpeter, sulfur, carbon, and horse-dung inthe form of dust, in the proportions of twelve to three to one to one parts by weight respectively, substantially as described.

In testimony whereof, I affix my signature in the presence of two Witnesses.

WILHELM EBERLE. I

Witnesses:

RAY SIGsnnn, Jos; H. Laure. 

